package henu.javaweb.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import henu.javaweb.util.WebDbPool;

/**
 * Servlet implementation class DeleteTeacherServlet
 */
@WebServlet("/DeleteTeacherServlet")
public class DeleteTeacherServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public DeleteTeacherServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//response.getWriter().append("Served at: ").append(request.getContextPath());
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		PrintWriter out=response.getWriter();
		String sql = "delete from tb_teacher where t_id = ?;";
        try {
            
            PreparedStatement ps = WebDbPool.executePreparedStatement(sql);
            if(request.getParameter("id")!=null) {
            	ps.setString(1, request.getParameter("id"));
            
            ps.executeUpdate();}
            String a = URLEncoder.encode("删除成功", "UTF-8"); 
    		out.print("<script type=\'text/javascript\'>alert(decodeURIComponent('"+a+"'));history.go(-1);</script>");
        } catch (SQLException e) {
            e.printStackTrace();
            String a = URLEncoder.encode("删除失败", "UTF-8"); 
    		out.print("<script type=\'text/javascript\'>alert(decodeURIComponent('"+a+"'));history.go(-1);</script>");
        }
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//doGet(request, response);
	}

}
